package demo4;

/**
 * @Author 12629
 * @Description：
 */
class Student {
}
class Teacher {

}
class School {
    public Student[] students;
    public Teacher[] teachers;
}

public class Test {

    public static void main(String[] args) {

    }
    public static void main1(String[] args) {
        /*final int a = 10;
        a = 20;*/
        final int[] array = {1,2,3,4};
        //array = new int[] {7,8,9};//1
        array[0] = 99;//2

         /**/
    }
}
